SOLUTION: Let A = a11 a21 a11 a12 a22 a12 a13 a23 a13 where aij 2R for each 1<=i;j<=3: Which of the following is/are true? A. det(A) = 0 B. A is invertible

Algebra ->  Matrices-and-determiminant -> SOLUTION: Let A = a11 a21 a11 a12 a22 a12 a13 a23 a13 where aij 2R for each 1<=i;j<=3: Which of the following is/are true? A. det(A) = 0 B. A is invertible       Log On


   

Question 892546: Let A =
a11 a21 a11
a12 a22 a12
a13 a23 a13
where aij 2R for each 1<=i;j<=3: Which of the following is/are true?
A. det(A) = 0
B. A is invertible
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
since col 1 and col 3 are the same the det is zero
A. det(A) = 0